1. Micro USB and USB dual connector, compatible with desktop PC, laptops and micro USB phones.2. Supports OTG function, you could view your data files on your phone, a good solution to expand your phone memory. Note: The phone needs to support OTG function as well.3. Zinc alloy housing, smooth and more durable.4. With a hanging hole at its side, it can be portable and not easy to be lost with string.5. Card reader only, the memory card is not included.